This is a soulful work dedicated to all souls who have "loved, missed, and regretted". It invites you to walk into this maze of emotions and witness how the unreached warmth finally condenses into the heaviest and most crystal clear mark in life under the snow of time. When the wind and snow fall again, can that dark gray scarf still find the body temperature it originally longed to embrace? The answer may be hidden in the long sigh of every reader after closing the book.